Hi,
I have a scenario where two separate drivers are installing/producing "PCI IO"
protocol with same GUID (gEfiPciIoProtocolGuid).
Where:
(1) One of the PCI Io protocol instance is produced by
"MdeModulePkg/Bus/Pci/PciBus" driver for real PCI devices to use( like
E1000/NIC card to use)
(2) Other PCI Io protocol instance is produced by "Pci Emulation" layer
created for USB and SATA kind of controllers. This protocol (APIs) is intended
to be used by USB and SATA controller drivers.
Now when I use "OpenProtocol" in my "Platform specific Sata controller driver"
using:
Status = gBS->OpenProtocol (
Controller,
&gEfiPciIoProtocolGuid,
(VOID **) &PciIo,
This->DriverBindingHandle,
Controller,
EFI_OPEN_PROTOCOL_GET_PROTOCOL
);
How can I make sure that PCI Io protocol that is produced by "PciEmulation"
layer driver is getting opened?
As "gEfiPciIoProtocolGuid" is same for both protocol instances.
How to handle such scenarios?
Thanks and Regards,
Shaveta
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